Inconsistent performance
First, the matte medium. It worked very well, even giving the paper a linen effect, because it dries with subtle striping.
Next, the crazing medium. Definitely not worth buying again. If there was any crazing, I couldn't see it. It also removed some of the printer ink from my page.
I haven't tried the vintage medium.
The was worth a try, given the price, but I'm going back to good ole Mod Podge.